What’s Vulnerable › Vulnerabilities

CVE-2022-23655: Missing server signature validation in OctoberCMS

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-24 · updated 2026-06-17
• Weakness: CWE-347

Description

Octobercms is a self-hosted CMS platform based on the Laravel PHP Framework. Affected versions of OctoberCMS did not validate gateway server signatures. As a result non-authoritative gateway servers may be used to exfiltrate user private keys. Users are advised to upgrade their installations to build 474 or v1.1.10. The only known workaround is to manually apply the patch (e3b455ad587282f0fbcb7763c6d9c3d000ca1e6a) which adds server signature validation.

Affected products

• octobercms october: before 1.0.475; from 1.1.0 before 1.1.11 — fixed in 1.0.475, 1.1.11

How to fix

Upgrade to a fixed version: octobercms october 1.0.475, 1.1.11. Check the vendor advisory for mitigations.

References

• https://github.com/octobercms/october/commit/e3b455ad587282f0fbcb7763c6d9c3d000ca1e6a
• https://github.com/octobercms/october/security/advisories/GHSA-53m6-44rc-h2q5
• https://github.com/octobercms/october/commit/e3b455ad587282f0fbcb7763c6d9c3d000ca1e6a
• https://github.com/octobercms/october/security/advisories/GHSA-53m6-44rc-h2q5

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